On 02/06/2012 04:19 PM, Thierry Reding wrote: > This commit modifies the PWM core to support multiple PWMs per struct > pwm_chip. I think you should mention what motivates this change. > It achieves this in a similar way to how gpiolib works, by > allowing PWM ranges to be requested dynamically (pwm_chip.base == -1) or > starting at a given offset (pwm_chip.base >= 0). If we've learned one thing from gpiolib, I think it is that using a global index to identify a resource was a bad idea. > A chip specifies how > many PWMs it controls using the npwm member. Each of the functions in > the pwm_ops structure gets an additional argument that specified the PWM > number (it can be converted to a per-chip index by subtracting the > chip's base). > > The total maximum number of PWM devices is currently fixed to 64, but > can easily be made configurable via Kconfig. The code says 1024. > > The patch is incomplete in that it doesn't convert any existing drivers > that are now broken. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
